fix(sdk): sync http_client.go.tmpl with hand-edited client.go extensions

Syncs the Go SDK generator template with the streaming client, multi-status
response handling, and Project() accessor that were added in 55e85ca but
not back-ported to the template. This ensures `make generate-sdk` produces
output compatible with hand-written extension files (session_messages.go,
agent_extensions.go).

Co-Authored-By: Claude Opus 4.6 <noreply@anthropic.com>

Author: jsell-rh

components/ambient-sdk/generator/templates/go/http_client.go.tmpl

@@ -25,6 +25,7 @@ import (
 
 type Client struct {
 	httpClient         *http.Client
+	streamingClient    *http.Client
 	baseURL            string
 	token              string
 	project            string
@@ -44,17 +45,21 @@ func WithTimeout(timeout time.Duration) ClientOption {
 func WithInsecureSkipVerify() ClientOption {
 	return func(c *Client) {
 		c.insecureSkipVerify = true
-		t, ok := c.httpClient.Transport.(*http.Transport)
-		if !ok || t == nil {
-			t = http.DefaultTransport.(*http.Transport).Clone()
-		} else {
-			t = t.Clone()
+		applyInsecure := func(hc *http.Client) {
+			t, ok := hc.Transport.(*http.Transport)
+			if !ok || t == nil {
+				t = http.DefaultTransport.(*http.Transport).Clone()
+			} else {
+				t = t.Clone()
+			}
+			if t.TLSClientConfig == nil {
+				t.TLSClientConfig = &tls.Config{MinVersion: tls.VersionTLS12}
+			}
+			t.TLSClientConfig.InsecureSkipVerify = true //nolint:gosec
+			hc.Transport = t
 		}
-		if t.TLSClientConfig == nil {
-			t.TLSClientConfig = &tls.Config{MinVersion: tls.VersionTLS12}
-		}
-		t.TLSClientConfig.InsecureSkipVerify = true //nolint:gosec
-		c.httpClient.Transport = t
+		applyInsecure(c.httpClient)
+		applyInsecure(c.streamingClient)
 	}
 }
 
@@ -95,15 +100,19 @@ func NewClient(baseURL, token, project string, opts ...ClientOption) (*Client, e
 		return nil, fmt.Errorf("invalid base URL: %w", err)
 	}
 
+	streamingTransport := http.DefaultTransport.(*http.Transport).Clone()
+	streamingTransport.DisableCompression = true
+
 	c := &Client{
 		httpClient: &http.Client{
 			Timeout: 30 * time.Second,
 		},
-		baseURL:   strings.TrimSuffix(baseURL, "/"),
-		token:     token,
-		project:   project,
-		logger:    slog.Default(),
-		userAgent: "ambient-go-sdk/1.0.0",
+		streamingClient: &http.Client{Transport: streamingTransport},
+		baseURL:         strings.TrimSuffix(baseURL, "/"),
+		token:           token,
+		project:         project,
+		logger:          slog.Default(),
+		userAgent:       "ambient-go-sdk/1.0.0",
 	}
 
 	for _, opt := range opts {
@@ -115,6 +124,10 @@ func NewClient(baseURL, token, project string, opts ...ClientOption) (*Client, e
 	return c, nil
 }
 
+func (c *Client) Project() string {
+	return c.project
+}
+
 func NewClientFromEnv(opts ...ClientOption) (*Client, error) {
 	baseURL := os.Getenv("AMBIENT_API_URL")
 	if baseURL == "" {
@@ -135,6 +148,10 @@ func NewClientFromEnv(opts ...ClientOption) (*Client, error) {
 }
 
 func (c *Client) do(ctx context.Context, method, path string, body []byte, expectedStatus int, result interface{}) error {
+	return c.doMultiStatus(ctx, method, path, body, result, expectedStatus)
+}
+
+func (c *Client) doMultiStatus(ctx context.Context, method, path string, body []byte, result interface{}, expectedStatuses ...int) error {
 	url := c.baseURL + "{{.Spec.BasePath}}" + path
 
 	req, err := http.NewRequestWithContext(ctx, method, url, nil)
@@ -175,7 +192,14 @@ func (c *Client) do(ctx context.Context, method, path string, body []byte, expec
 		slog.Int("body_len", len(respBody)),
 	)
 
-	if resp.StatusCode != expectedStatus {
+	statusOK := false
+	for _, s := range expectedStatuses {
+		if resp.StatusCode == s {
+			statusOK = true
+			break
+		}
+	}
+	if !statusOK {
 		var apiErr types.APIError
 		if json.Unmarshal(respBody, &apiErr) == nil && apiErr.Code != "" {
 			apiErr.StatusCode = resp.StatusCode